00 cv 3p086156-13y€¦ · safety considerations.....1 2. before installation ... or lightning rods...

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MODELSCeiling-mounted Duct type

FXMQ72MVJUFXMQ96MVJU

SYSTEM Inverter Air Conditioners

INSTALLATION MANUAL

READ THESE INSTRUCTIONS CAREFULLY BEFORE INSTALLATION.KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE REFERENCE.

LIRE SOIGNEUSEMENT CES INSTRUCTIONS AVANT L’INSTALLATION.CONSERVER CE MANUEL A PORTEE DE MAIN POUR REFERENCE ULTERIEURE.

LEA CUIDADOSAMENTE ESTAS INSTRUCCIONES ANTES DE INSTALAR.GUARDE ESTE MANUAL EN UN LUGAR A MANO PARA LEER EN CASO DE TENER ALGUNA DUDA.

00_CV_3P086156-13Y.fm Wednesday, September 9, 2009 2:52 PM

1 English

VRV SYSTEM Inverter Air Conditioners Installation manual

CONTENTS1. SAFETY CONSIDERATIONS ..........................................12. BEFORE INSTALLATION.................................................3

3. SELECTING INSTALLATION SITE ..................................4

4. PREPARATIONS BEFORE INSTALLATION ....................45. INDOOR UNIT INSTALLATION........................................5

6. REFRIGERANT PIPING WORK......................................5

7. DRAIN PIPING WORK.....................................................68. ELECTRIC WIRING WORK.............................................7

9. WIRING EXAMPLE AND HOW TO SET

THE REMOTE CONTROLLER ........................................810. FIELD SETTING ............................................................10

11. TEST OPERATION ........................................................10

1. SAFETY CONSIDERATIONSRead these “SAFETY CONSIDERATIONS for Installation” care-fully before installing air conditioning equipment. After complet-ing the installation, make sure that the unit operates properly during the startup operation.Instruct the customer on how to operate and maintain the unit. Inform customers that they should store this Installation Manual with the Operation Manual for future reference.Always use a licensed installer or contractor to install this prod-uct. Improper installation can result in water or refrigerant leak-age, electrical shock, fire, or explosion.Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols:

DANGER .................Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING ...............Indicates a potentially hazardous situ-ation which, if not avoided, could result in death or serious injury.

CAUTION ................Indicates a potentially hazardous situ-ation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.

NOTE ......................Indicates situations that may result in equipment or property-damage acci-dents only.

DANGER

• Refrigerant gas is heavier than air and replaces oxygen. A massive leak can lead to oxygen depletion, especially in basements, and an asphyxiation hazard could occur leading to serious injury or death.

• Do not ground units to water pipes, gas pipes, telephone wires, or lightning rods as incomplete grounding can cause a severe shock hazard resulting in severe injury or death. Additionally, grounding to gas pipes could cause a gas leak and potential explosion causing severe injury or death.

• If refrigerant gas leaks during installation, ventilate the area immediately. Refrigerant gas may produce toxic gas if it comes in contact with fire. Exposure to this gas could cause severe injury or death.

• After completing the installation work, check that the re-frigerant gas does not leak throughout the system.

• Do not install unit in an area where flammable materials are present due to risk of explosions that can cause se-rious injury or death.

• Safely dispose all packing and transportation materials in accordance with federal/state/local laws or ordi-nances. Packing materials such as nails and other metal or wood parts, including plastic packing materials used for transportation may cause injuries or death by suffo-cation.

WARNING

• Only qualified personnel must carry out the installation work. Installation must be done in accordance with this installation manual. Improper installation may result in water leakage, electric shock, or fire.

• When installing the unit in a small room, take measures to keep the refrigerant concentration from exceeding al-lowable safety limits. Excessive refrigerant leaks, in the event of an accident in a closed ambient space, can lead to oxygen deficiency.

• Use only specified accessories and parts for installation work. Failure to use specified parts may result in water leakage, electric shocks, fire, or the unit falling.

• Install the air conditioner on a foundation strong enough that it can withstand the weight of the unit. A foundation of insufficient strength may result in the unit falling and causing injuries.

• Take into account strong winds, typhoons, or earth-quakes when installing. Improper installation may result in the unit falling and causing accidents.

• Make sure that a separate power supply circuit is provid-ed for this unit and that all electrical work is carried out by qualified personnel according to local state, and na-tional regulations. An insufficient power supply capacity or improper electrical construction may lead to electric shocks or fire.

• Make sure that all wiring is secured, that specified wires are used, and that no external forces act on the terminal connections or wires. Improper connections or installa-tion may result in fire.

• When wiring, position the wires so that the electrical components box lid can be securely fastened. Improper positioning of the electrical components box lid may re-sult in electric shocks, fire, or the terminals overheating.

• Before touching electrical parts, turn off the unit.

• Be sure to install a ground fault circuit interrupter if one is not already available. This helps prevent electrical shocks or fire.

01_EN_3P086156-13Y.fm Page 1 Wednesday, September 16, 2009 2:22 PM

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• Securely fasten the outside unit terminal cover (panel). If the terminal cover/panel is not installed properly, dust or water may enter the outside unit causing fire or electric shock.

• When installing or relocating the system, keep the refrig-erant circuit free from substances other than the speci-fied refrigerant (R-410A) such as air. Any presence of air or other foreign substance in the refrigerant circuit can cause an abnormal pressure rise or rupture, resulting in injury.

• Do not change the setting of the protection devices. If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Daikin are used, fire or explosion may occur.

CAUTION

• Do not touch the switch with wet fingers. Touching a switch with wet fingers can cause electric shock.

• Do not allow children to play on or around the unit to pre-vent injury.

• Do not touch the refrigerant pipes during and immedi-ately after operation as the refrigerant pipes may be hot or cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal tem-perature or, if you must touch them, be sure to wear proper gloves.

• Heat exchanger fins are sharp enough to cut.To avoid injury wear glove or cover the fins when work-ing around them.

• Install drain piping to proper drainage. Improper drain piping may result in water leakage and property damage.

• Insulate piping to prevent condensation.

• Be careful when transporting the product.

• Do not turn off the power immediately after stopping op-eration. Always wait for at least 5 minutes before turning off the power. Otherwise, water leakage may occur.

• Do not use a charging cylinder. Using a charging cylin-der may cause the refrigerant to deteriorate.

• Refrigerant R-410A in the system must be kept clean, dry, and tight.(a)Clean and Dry -- Foreign materials (including mineral

oils such as SUNISO oil or moisture) should be pre-vented from getting into the system.

(b)Tight -- R-410A does not contain any chlorine, does not destroy the ozone layer, and does not reduce the earth’s protection again harmful ultraviolet radiation. R-410A can contribute to the greenhouse effect if it is released. Therefore take proper measures to check for the tightness of the refrigerant piping installation. Read the chapter Refrigerant Piping and follow the procedures.

• Since R-410A is a blend, the required additional refriger-ant must be charged in its liquid state. If the refrigerant is charged in a state of gas, its composition can change and the system will not work properly.

• The indoor unit is for R-410A. See the catalog for indoor models that can be connected. Normal operation is not possible when connected to other units.

• Remote controller (wireless kit) transmitting distance can be shorter than expected in rooms with electronic fluorescent lamps (inverter or rapid start types). Install the indoor unit far away from fluorescent lamps as much as possible.

• Indoor units are for indoor installation only. Outdoor units can be installed either outdoors or indoors.

• Do not install the air conditioner in the following loca-tions:(a)Where a mineral oil mist or oil spray or vapor is pro-

duced, for example, in a kitchen.Plastic parts may deteriorate and fall off or result in water leakage.

(b)Where corrosive gas, such as sulfurous acid gas, is produced.Corroding copper pipes or soldered parts may result in refrigerant leakage.

(c)Near machinery emitting electromagnetic waves.Electromagnetic waves may disturb the operation of the control system and cause the unit to malfunction.

(d)Where flammable gas may leak, where there is carbon fiber, or ignitable dust suspension in the air, or where volatile flammables such as thinner or gasoline are handled. Operating the unit in such conditions can cause a fire.

• Take adequate measures to prevent the outside unit from being used as a shelter by small animals. Small ani-mals making contact with electrical parts can cause mal-functions, smoke, or fire. Instruct the customer to keep the area around the unit clean.

NOTE

• Install the power supply and control wires for the indoor and outdoor units at least 3.5 feet away from televisions or radios to prevent image interference or noise. Depending on the radio waves, a distance of 3.5 feet may not be sufficient to eliminate the noise.

• Dismantling the unit, treatment of the refrigerant, oil and additional parts must be done in accordance with the rel-evant local, state, and national regulations.

• Do not use the following tools that are used with conven-tional refrigerants: gauge manifold, charge hose, gas leak detector, reverse flow check valve, refrigerant charge base, vacuum gauge, or refrigerant recovery equipment.

• If the conventional refrigerant and refrigerator oil are mixed in R-410A, the refrigerant may deteriorate.

• This air conditioner is an appliance that should not be accessible to the general public.

• The wall thickness of field-installed pipes should be selected in accordance with the relevant local, state, and national regulations.


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2. BEFORE INSTALLATION• When moving the unit while removing it from the carton

box, be sure to lift it by holding on to the four lifting lugs without exerting any pressure on other parts, especially, the refrigerant piping, drain piping, and other resin parts.

• Be sure to check the type of R410A refrigerant to be used before installing the unit. (Using an incorrect refrigerant will prevent normal operation of the unit.)

• The accessories needed for installation must be retained in your custody until the installation work is completed. Do not discard them!

• Decide upon a line of transport.• Leave the unit inside its packaging while moving, until reach-

ing the installation site. Where unpacking is unavoidable, use a sling of soft material or protective plates together with a rope when lifting, to avoid damage or scratches to the unit.

• When moving the unit at or affter opening, hold the unit by the hanger brackets (× 4). Do not apply force to the refrigerant piping, drain piping or plastic parts.

• For the installation of an outdoor unit, refer to the installation manual attached to the outdoor unit.

• Do not install or operate the unit in rooms mentioned below.• Laden with mineral oil, or filled with oil vapor or spray

like in kitchens. (Plastic parts may deteriorate which could eventually cause the unit to fall out of place, or could lead to leaks.)

• Where corrosive gas like sulfurous gas exists. (Cop-per tubing and brazed spots may corrode which could eventually lead to refrigerant leaks.)

• Where exposed to combustible gases and where vol-atile flammable gas like thinner or gasoline is used. (Gas in the vicinity of the unit could ignite.)

• Where machines can generate electromagnetic waves. (Control system may malfunction.)

• Where the air contains high levels of salt such as that near the ocean and where voltage fluctuates greatly such as that in factories. Also in vehicles or vessels.

• This unit, both indoor and outdoor, is suitable for installation in a commercial and light industrial environment.If installed as a household appliance it could cause electro-magnetic interference.

2-1 PRECAUTIONS• Be sure to read this manual before installing the indoor unit.• Entrust installation to the place of purchase or a qualified ser-

viceman. Improper installation could lead to leaks and, in worse cases, electric shock of fire.

• Use only parts provided with the unit or parts satisfying required specifications. Unspecified parts could cause the unit to fall out of place, or could lead to leaks and, in worse cases, electric shock or fire.

• Be sure to mount an air filter (part to be procured in the field) in the suction air passage in order to prevent water leaking, etc.

2-2 ACCESSORIES

Check the following accessories are included with your unit.

2-3 OPTIONAL ACCESSORIES• A wired remote controller is necessary for this unit sepa-

rately.

NOTE

• If you wish to use a remote controller that is different from the above, select a suitable remote controller after consulting catalogs and technical materials.

FOR THE FOLLOWING ITEMS, TAKE SPECIAL CARE DURING CONSTRUCTION AND CHECK AFTER INSTALLATION IS FINISHED.

a. Items to be checked after completion of work

NameAttached piping (1)

Insulation tube (2)

(Other)(3) Operation manual(4) Installation manual(5) Screws for flange connec-

tion (M5) (48 pcs.)(6) Insulation material (for

hanger) (2 pcs.)(7) Washers (8 pcs.)(8) Clamps (6 pcs.)(9) Hexagon head bolt for

pipe frange (M10) (2 pcs.)(10) Spring washer for pipe

frange (M10) (2 pcs.)

Quantity 1 set 2 pcs.

Shape

Items to be checkedIf not properly done, what is likely to occur.

Check

Are the indoor and outdoor unit fixed firmly?

The units may drop, vibrate or make noise.

Is the gas leak test finished? It may result in insufficient cool-ing.

Is the unit fully insulated? Condensate water may drip.

Dose drainage flow smoothly? Condensate water may drip.

Dose the power supply voltage correspond to that shown on the name plate?

The unit may malfunction or the components burn out.

Are wiring and piping correct?The unit may malfunction or the components burn out.

Is the unit safely grounded? Dangerous at electric leakage.

Is wiring size according to specifications?

The unit may malfunction or the components burn out.

Is something blocking the air outlet or inlet of either the indoor or outdoor units?

It may result in insufficient cool-ing.

Are refrigerant piping length and additional refrigerant charge noted down?

The refrigerant charge in the system is not clear.


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b. Items to be checked at time of deliveryAlso review the “SAFETY CONSIDERATIONS”

c. Points for explanation about operations

2-4 NOTE TO INSTALLER• Be sure to instruct customers how to properly operate the

unit (especially cleaning filters, operating different functions, and adjusting the temperature) by having them carry out operations themselves while looking at the manual.

3. SELECTING INSTALLATION SITEPlease attach additional thermal insulation material to the unit body when it is believed that the relative humidity in the ceiling exceeds 80%. Use glass wool, polyethylene foam, or similar with a thickness of 3/8in. or more as thermal insulation material.

(1) Select an installation site where the following conditions are fulfilled and that meets with your customer’s approval.• In the upper space (including the back of the ceiling) of the

indoor unit where there is no possible dripping of water from the refrigerant pipe, drain pipe, water pipe, etc.

• Where optimum air distribution can be ensured.• Where nothing blocks the air passage.• Where condensate can be properly drained.• If supporting structural members are not strong enough

to take the unit’s weight, the unit could fall out of place abd cause serious injury.

• Where the false ceiling is not noticeably on an incline.• Where there is no risk of flammable gas leakage.• Where sufficient clearance for maintenance and service

can be ensured. (Refer to Fig. 1)• Where piping between indoor and outdoor units is possi-

ble within the allowable limit. (Refer to the installation manual of the outdoor unit.)

CAUTION

• Install the indoor and outdoor units, power supply wiring and connecting wires at least 3.3ft. away from televisions or radios in order to prevent image interference or noise.(Depending on the radio waves, a distance of 3.3ft. may not be sufficient enough to eliminate the noise.)

(2) Use suspension bolts for installation. Check whether the ceiling is strong enough to support the weight of the unit or not. If there is a risk, reinforce the ceiling before installing the unit.

4. PREPARATIONS BEFORE INSTALLATION(1) Relative positions of indoor unit and suspension bolt.

(Refer to Fig. 2)

(2) Install a canvass duct to the air discharge outlet and air inlet so that vibration from the machine body isn’t transmitted to the duct or ceiling.You should also apply acoustic (insulation material) to the inside of the duct, and vibration insulation rubber to the sus-pension bolts.

(3) Install suspension bolts.(Use bolts of 3/8in. diameter.)• Install the equipment where supporting structures are

strong enough to bear the equipment’s weight. Use embedded inserts or anchor bolts with new buildings and hole-in-anchors with old buildings.

Items to be checked Check

Did you explain about operations while showing the instruction manual to your customer?

Did you hand the instruction manual over to your customer?

The items with WARNING and CAUTION marks in the instruc-tion manual are the items pertaining to possibilities for bodily injury and material damage in addition to the general usage of the product. Accordingly, it is necessary that you make a full explanation about the described contents and also ask your customers to read the instruction manual.

Fig. 1

Min. 25-9/16 (service space)

18-1

/2

(length: in.)

Fig. 2

Indoor unit

Air outlet

Inspection hatch 23-5/8

51

Air inlet

App

rox.

5-

7/8

43-5/16

43-5/16 or more

45-3/16

54-5

/16

(service space)

Suspension bolt (× 4)

(length: in.)

25-9

/16

or m

ore

(ser

vice

spac

e)

Anchor

Indoor unit

Long nut or turn-buckle

Installation example

Note) All the above parts are field supplied.

Suspension bolt

Ceiling slab


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5. INDOOR UNIT INSTALLATIONInstalling optional accessories before installing the indoor unit is easier.As for the parts to be used for installation work, be sure to use the provided accessories and specified parts designated by our company.(1) Fix the hanger bracket to the suspension bolt. Tighten both

upper and lower nuts firmly using washers.

(2) Adjust the height of the unit.(3) Make sure the unit is

level.• Level the unit with

a level when install-ing. If the unit is not level, it could become the source of water leaks.

• When leveling the unit, check all four corners with a level or a vinyl tube con-taining water. (See the figure on the right.)

(4) Tighten the nuts on the top.(5) Insulate the two hanger brackets on the discharge side with

the insulation material. Insulate the edges so that the sur-face and edges of the hanger brackets cannot be seen.

CAUTION

Setting the unit at an angle opposite to the drain piping might cause leaks.

6. REFRIGERANT PIPING WORK⟨For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.⟩ ⟨Execute heat insulation work completely on both sides of the gas piping and the liquid piping. Otherwise, a water leakage can result sometimes.⟩(When using a heat pump, the temperature of the gas piping can reach up to approximately 248°F, so use insulation which is sufficiently resistant.)⟨Also, in cases where the temperature and humidity of the refrigerant piping sections might exceed 86°F or RH80%, rein-force the refrigerant insulation. (3/4in. or thicker) Condensa-tion may form on the surface of the insulating material.⟩

⟨Before refrigerant piping work, check which type of refrig-erant is used. Proper operation is not possible if the types of refrigerant are not the same.⟩

CAUTION

• Use a pipe cutter and flare suitable for the type of refrig-erant.

• Apply ester oil or ether oil inside the flare portions before connecting.

• To prevent dust, moisture or other foreign matter from infiltrating the tube, either pinch the end or cover it with tape.

• Do not allow anything other than the designated refrig-erant to get mixed into the refrigerant circuit, such as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly right away.

• The outdoor unit is charged with refrigerant.• Be sure to use both a spanner and torque wrench together,

as shown in the drawing, when connecting or disconnecting pipes to/from the unit.

• To prevent flare nut cracking and gas leaks, be sure to use both a spanner and torque wrench together, as shown in the drawing below, when connecting or disconnecting pipes to/from the unit.

• Refer to the Table 1 for the dimensions of flare nut spaces.• When connecting the flare nut, coat the flare section inside

with ester oil or ether oil, rotate three or four times first, then screw in.

• Refer to the Table 1 for tightening torque. • Ventilate if refrigerant gas leaks while performing work.

Table 1

NOTE

The flare nuts used must be those included with the main body.

Part to be procured in the field

Tighten from above and below (Double nut)

Washer (accessory (7))

B

B

Insulation material (accessory (6))

A-A cross-section

Hanger bracket setting bolt

AA

Vinyl tube

Hanger bracket setting bolt

Level

B-B cross-section

Pipe size

Tightening torque(ft.lbf)

Flare dimensions

A (in.)Flare shape (in.)

φ 1/4” 10.4 - 12.7 0.342 - 0.358

φ 3/8” 24.1 - 29.4 0.504 - 0.520

φ 1/2” 36.5 - 44.5 0.638 - 0.654

φ 5/8” 45.6 - 55.6 0.760 - 0.776A

450 ±2

0 R0.016-0.031

900±2

0

Ester oil or ether oil.

Torque wrench

Spanner

Piping union

Flare nut


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CAUTION

Over-tightening may damage the flare and cause a refriger-ant leakage.

Use “ Table 2 ” as a reference if a torque wrench is not available. Once work is complete, make sure there is no gas leaking. As the flare nut is tightened with the wrench, the torque will sud-denly increase. From that position, tighten the nut to the angle shown on “ Table 2 ”.• After checking the pipe-connection for gas leakage, be sure

to insulate the liquid and gas piping, referring to the figure below.

• Wrap the sealing pad (field supply) only around the insulation for the joints on the gas piping side.

CAUTION

Be sure to insulate any field piping all the way to the piping connection inside the unit. Any exposed piping may cause condensation or burns if touched.

NOTE

• Attached piping is needed for connecting gas piping. Use attached piping according to the size of the piping to be con-nected.When connecting the included piping, use the included pip-ing flange hex bolts accessory (9) and spring washers acces-sory (10).

• Connect refrigerant piping and branching according to the attached installation manuals that come with the outdoor unit.

CAUTION

CAUTION TO BE TAKEN WHEN BRAZING REFRIGER-ANT PIPINGDo not use flux when brazing refrigerant piping. Therefore, use the phosphor copper brazing filler metal (BCuP-2/B-Cu93P-710/795) which does not require flux.(Flux has extremely harmful infulence on refrigerant piping sysems. For instance, if the chlorine based flux is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will damage the refrigerant oil.)

• Before brazing local refrigerant piping, nitrogen gas shall be blown through the piping to expel air from the piping.If your brazing is done without nitrogen gas blowing, a large amount of oxide film develops inside the piping, and could cause system malfunction.

• When brazing the refrigerant piping, only begin brazing after having carried out nitrogen substitution or while inserting nitrogen into the refrigerant piping. Once this is done, con-nect the indoor unit with a flared or a flanged connection.

• Nitrogen should be set to 2.90PSI with a pressure-reducing valve if brazing while inserting nitrogen into the piping.

Not recommendable but in case of emergencyYou must use a torque wrench but if you are obliged to install the unit without a torque wrench, you may follow the installation method mentioned below.

After the work is finished, make sure to check that there is no gas leak.

When you keep on tightening the flare nut with a spanner, there is a point where the tightening torque suddenly increases. From that position, further tighten the flare nut the angle shown below:

Table 2

7. DRAIN PIPING WORK⟨⟨Rig the drain pipe as shown below and take measures against condensation. Improperly rigged piping could lead to leaks and eventually wet furniture and belongings.⟩⟩⟨⟨Insulate the drain hose inside the building.⟩⟩

(1) Carry out the drain piping.

Indoor units to be connected

Gas piping diameterLiquid piping

diameter

FXMQ72MVJUφ3/4

Use attached piping.φ3/8

FXMQ96MVJUφ7/8

Use attached piping.

Sealing pad

(Field supply)Insulation for fitting (Field supply)

Gas pipe

Liquid pipe

(for gas line)

Clamp

(accessory (8))

Pipe sizeFurther tightening

angleRecommended arm length of

tool

φ 1/4” 60 to 90 degrees Approx. 5-7/8in.




Nitrogen

Refrigerant piping Part to be

brazed Taping

Pressurereducing valve

hands valve

Nitrogen

Bottom of unit

Attached drain hose


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• Keep piping as short as possible and slope it downwards so that air may not remaine trapped inside the pipe.

• Keep pipe size equal to or greater than that of the con-necting pipe (Vinyl pipe of 1in. nominal diam. and 1-1/4in. outer diam.).

• Insulate the clamp metal with the sealing pad.

• There is negative pressure inside the unit relative to atmo-spheric pressure when the unit is running, so be sure to provide drain frap on the drain outlet. (See the figure)

• In order to prevent foreign matter from building up inside the piping, you should avoid curves as much as possible.

NOTE

• If converging multiple drain pipes, install according to the pro-cedure shown below. (Install a drain trap for each indoor unit.)

• A drain trap need not be installed.• The diameter of the piping is the same as that of the con-

necting pipe (PS1B), and should be kept equal to or greater than that of the connecting pipe.

(2) After piping work is finished, check drainage flows smoothly.

• Open the water supply port, add appximately 61in3. of water

slowly into the drain pan and check drainage flow.

CAUTION

• Drain piping connectionsDo not connect the drain piping directly to sewage pipes that smell of ammonia. The ammonia in the sewage might enter the indoor unit through the drain pipes and corrode the heat exchanger.

8. ELECTRIC WIRING WORK

8-1 GENERAL INSTRUCTIONS • All field supplied parts and materials and electric works must

conform to local codes.• Use copper wire only.• For electric wiring work, refer to also “Wiring diagram label”

attached to the electrical components box lid.• For remote controller wiring details, refer to the installation

manual attached to the remote controller.• All wiring must be performed by an authorized electrician.

• This system consists of multiple indoor units. Mark each indoor unit as unit A, unit B..., and be sure the terminal board wiring to the outdoor unit and BS unit are properly matched. If wiring and piping between the outdoor unit and an indoor unit are mismatched, the system may cause a malfunction.

• A ground fault circuit interrupter capable of shutting down power supply to the entire system must be installed.

• Refer to the installation manual attached to the outdoor unit for the size of power supply wiring connected to the outdoor unit, the capacity of the ground fault circuit interrupter and switch, and wiring instructions.

• Be sure to ground the air conditioner.• Do not connect the ground wire to gas and water pipes, light-

ning rods, or telephone ground wires.• Gas pipes : might cause explosions or fire if gas leaks.• Water pipes : no grounding effect if hard vinyl piping is

used.• Telephone ground wires or lightning rods : might cause

abnormally high electric potential in the ground during lighting storms.

8-2 ELECTRICAL CHARACTERISTICS

MCA: Min. Circuit Amps (A); MFA: Max. Fuse Amps (A) kW: Fan Motor Rated Output (kW); FLA: Full Load Amps (A)

8-3 SPECIFICATIONS FOR FIELD SUPPLIED FUSES AND WIRE

NOTE

1. Allowable length of transmission wiring between indoor/out-door units and between the indoor unit and the remote con-troller is as follows. (1) Outdoor unit – Indoor unit:

Max. 3280ft. (Total wiring length: 6560ft.) (2) Indoor unit – Remote controller:

Max. 1640ft.

Metal clamp

Drain hoseTape

1/8in. or less

Drain hose

Sealing pad

(Field supply)

Metal clamp

(Field supply)

3-15

/16i

n.

or m

ore

Units Power supply Fan motor

Model Hz VoltsVoltage range

MCA MFA W FLA

FXMQ72MVJU60

208-230

Max. 253Min. 187

9.5 15 380×2 7.6

FXMQ96MVJU 10.7 15 380×2 8.6

Model

Power supply wiringRemote controller wiring

Transmission wiring

Field fuses Size Wire Size

FXMQ72MVJU15A

Size must comply with local codes.

Sheathed wire (2 wire)

AWG18-16

FXMQ96MVJU


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9. WIRING EXAMPLE AND HOW TO SET THE REMOTE CONTROLLER

9-1 HOW TO CONNECT WIRINGS (Remove the electrical components box lid and wire as shown in the figure below.)

Routing power supply wiring and transmission wiringLet the power supply wiring with a conduit pass through one of the holes on the side cover, and let the transmission wiring with a conduit pass through another hole.• For protection from uninsulated live parts, thread the power

supply wiring or the transmission wiring through the included insulation tube and secure it with the included clamp.

CAUTION

• Be sure to attach the sealing material or putty (field supplied) to hole of wiring to prevent the infiltration of water as well as any insects and other small creatures from outside. Other-wise a short-circuit may occur inside the electrical compo-nents box.

• When clamping the wires, be sure no pressure is applied to the wire connections by using the included clamping material to make appropriate clamps. Also, when wiring, make sure the lid on the electrical components box fits snugly by arrang-ing the wires neatly and attaching the electrical components box lid firmly. When attaching the electrical components box lid, make sure no wires get caught in the edges. Pass wiring through the wiring through holes to prevent damage to them.

• Make sure the remote controller wiring, the wiring between the units, and other electrical wiring do not pass through the same locations outside of the unit, separating them by at least 2in., otherwise electrical noise (external static) could cause mistaken operation or breakage.

[ PRECAUTIONS ]

1. Use round crimp-style terminals for connecting wires to the power supply terminal block. If unavailable, observe the following points when wiring.• Do not connect wires of different gauge to the same

power supply terminal.(Looseness in the connection may cause overheating.)

• Use the specified electric wire. Connect the wire securely to the terminal. Lock the wire down without applying excessive force to the terminal. (Tightening torque: 0.97ft·lbf ±10 %)

2. Tightening torque for the terminal screws.• Use the correct screwdriver for tightening the terminal

screws. If the blade of screwdriver is too small, the head of the screw might be damaged, and the screw will not be properly tightened.

• If the terminal screws are tightened too hard, screws might be damaged.

• Refer to the table below for the tightening torque of the terminal screws.

3. Do not connect wires of different gauge to the same ground-ing terminal. Looseness in the connection may deteriorate protection.

4. Outside of the unit, keep transmission wiring at least 2in. away from power supply wiring. The equipment may mal-function if subjected to electrical (external) noise.

5. For remote controller wiring, refer to the “INSTALLATION MANUAL OF REMOTE CONTROLLER” attached to the remote controller.

6. Never connect power supply wiring to the terminal block for remote controller wiring. A mistake of the sort could damage the entire system.

7. Use only specified wire and tightly connect wires to terminals. Be careful wires do not place external stress on terminals. Keep wiring in neat order and so as not to obstruct other equip-ment such as popping open the electrical components box lid. Make sure the lid closes tight. Incomplete connections could result in overheating, and in worse case, electric shock or fire.

Electrical components box lid

Transmission wiring (*)

Ground wiring

Power supply wiring (*)(Field wiring)

Remote controller wiring (*)

(Field wiring)

(Field wiring)

Wiring (*)

(Remote controller and transmission)

Wire locking bracket

Clamp(accessory(8))

Conduit(Field supply)

Lock nut(Field supply)

Insulation tube(accessory (2))

Clamp(accessory (8))

Power supply wiring or

Transmission wiring

(3in.)

Clamp (accessory (8))

Power supply terminal block

Terminal block for remote controller

Remotecontroller wiring

X2M X1M

Transmission wiring

Power supply wiring and ground wiring

Insulation tube(accessory (2))

Insulation tube (accessory (2))

Ground terminal

Electric wireRound crimp-style terminal

Attach insulation sleeve

Terminal Size Tightening torque (ft·lbf)Terminal block for remote controller (6P) M3.5 0.58 - 0.72Power supply terminal blockGround terminal

M5M5

1.76 - 2.152.23 - 3.01


9 English

9-2 WIRING EXAMPLE • Fit the power supply wiring of each unit with a switch and fuse

as shown in the drawing. COMPLETE SYSTEM EXAMPLE (3 SYSTEMS)

1. When using 1 remote controller for 1 indoor unit. (Nor-mal operation)

2. For group control or use with 2 remote controllers

3. When including BS unit

[ PRECAUTIONS ]

1. A single switch can be used to supply power to units on the same system. However, branch switches and branch ground fault circuit interrupters must be selected carefully.

2. Do not ground the equipment on gas pipes, water pipes or lightning rods, or crossground with telephones. Improper grounding could result in electric shock.

9-3 CONTROL BY 2 REMOTE CONTROLLERS (Con-trolling 1 indoor unit by 2 remote controllers)

• When using 2 remote controllers, one must be set to “MAIN” and the other to “SUB”.

MAIN/SUB CHANGEOVER(1) Insert a screw driver into the recess between the upper

and lower part of remote controller and, working from the 2 positions, pry off the upper part. The remote controller PC board is attached to the upper part of remote controller.

(2) Turn the MAIN/SUB changeover switch on one of the two remote controller PC boards to “S”. (Leave the switch of the other remote controller set to “M”.)

Power supply wiring

Transmission wiring

Switch

Fuse

Power supply

Mainswitch

Remote controller

Indoor unit

BS unit(Only forHeatrecovery system)

L1 L2 L1IN/D OUT/D

F1 F2 F1 F2

Control box

L1 L2

L1L2 P1 P2

P1 P2

F1 F2 T1 T2 P1 P2

P1 P2

F1 F2 T1 T2L1L2 P1 P2

P1 P2

F1 F2 T1 T2L1L2 L1L2 P1 P2

P1 P2

F1 F2 T1 T2

L1

Outdoor unit

No. 1System

Indoor unit A

Indoor unit B

Indoor unit C

MostdownstreamIndoor unit

Power supply208-230V

60Hz


60Hz


60Hz


60HzL2 L2

L1 L2 L1 L2 L1 L2

Indoor unit A

IN/D OUT/DF1 F2 F1 F2

Control box

P1 P2

P1 P2

F1 F2 T1 T2 P1 P2 F1 F2 T1 T2 P1 P2 F1 F2 T1 T2 P1 P2 F1 F2 T1 T2

P1 P2P1 P2

L1 L2

Outdoor unit

No. 2System

Indoor unit B Indoor unit C

Most downstreamindoor unit

For use with 2remote controllers


60Hz


60Hz


60Hz


60Hz

Note: It is not necessary to designate indoor unit address when using group control. The address is automatically set when power is activated.

Fig. 3

L1 L2L1 L2L1 L2L1 L2

IN/D OUT/DF1 F2 F1 F2

IN/DOUT/DF1 F2 F1 F2

L1 L2

P1 P2

P1 P2 F1 F2 T1 T2

BS unitNo. 3System

Outdoor unitPower supply208-230V

60Hz

Indoor unit A Most downstreamindoor unit


60Hz

Control box

Control boxIN/DOUT/D

F1 F2 F1 F2

BS unitControl box

L1

P1 P2

P1 P2 F1 F2 T1 T2

L2

L1 L2 L1 L2

Upper part of remote controller

Lower part of remote controller

Insert the screwdriver here and gently work off the upper part of remote controller.

Only one remote controller needs to be changed if factory settings have remained untouched.

(Factory setting)S

MS

SM

Remote controller PC board


English 10

Wiring Method (See ‘‘ELECTRIC WIRING WORK’’)

(3) Remove the electrical components box lid

(4) Add remote control 2 (slave) to the terminal block for remote controller (P1, P2) in the electrical components box. (There is no polarity.) (Refer to Fig. 3 and 8-3.)

9-4 COMPUTERISED CONTROL (FORCED OFF AND ON/OFF OPERATION)

(1) Wire specifications and how to perform wiring • Connect the input from outside to terminals T1 and T2 of

the terminal block for remote controller.

(2) Actuation • The following table explains FORCED OFF and ON/OFF

OPERATIONS in response to Input A.

(3) How to select FORCED OFF and ON/OFF OPERATION • Turn the power on and then use the remote controller to

select operation.

9-5 CENTRALIZED CONTROL • For centralized control, it is necessary to designate the group

No. For details, refer to the manual of each optional control-lers for centralized control.

10. FIELD SETTINGMake sure the terminal box lids are closed on the indoor and outdoor units.Field setting must be made from the remote controller in accordance with the installation condition.• Setting can be made by changing the “Mode No.”, “FIRST

CODE NO.”, and “SECOND CODE NO.”.• For setting and operation, refer to the “FIELD SETTING” in

the installation manual of the remote controller.

• Set the remote controller to the field set mode. For details, refer to the “HOW TO SET IN THE FIELD”, in the remote controller manual.

• When in the field set mode, select mode No. 12, then set the first code (switch) No. to “1”. Then set second code (position) No. to “01” for FORCED OFF and “02” for ON/OFF OPERATION. (FORCED OFF at factory set)

11. TEST OPERATION Refer to the installation manual of the outdoor unit.• The operation lamp of the remote controller will flash when

an malfunction occurs. Check the malfunction code on the liquid crystal display to identify the point of trouble. An expla-nation of malfunction codes and the corresponding trouble is provided in “CAUTION FOR SERVICING” of the outdoor unit.If any of the items in Table 3 are displayed, there may be a problem with the wiring or power, so check the wiring again.

Table 3

Wire specification Sheathed vinyl cord or cable (2 wire)

Gauge AWG18-16

Length Max. 328ft.

External terminalContact that can ensure the minimum appli-cable load of 15 V DC, 1 mA.

FORCED OFF ON/OFF OPERATION

Input “ON” stops operation (impossible by remote controllers.)

Input OFF → ON turns ON unit.

Input OFF enables control by remote con-troller.

Input ON → OFF turns OFF unit.

F2 T1 T2FORCEDOFF

Input A

Remote control display Content

“Concentrated Management” is lit up

• There is a short circuit at the FORCED OFF terminals (T1, T2)

“U4” is lit up“UH” is lit up

• The power on the outdoor unit is off.

• The outdoor unit has not been wired for power supply.

• Incorrect wiring for the transmis-sion wiring and / or FORCED OFF wiring.

No display

• The power on the indoor unit is off.

• The indoor unit has not been wired for power supply.

• Incorrect wiring for the remote controller wiring, the transmission wiring and / or the FORCED OFF wiring.

SETTING

MODE NO.

SECOND CODE NO.

FIELD SET MODE

FIRST CODE NO.


1645 Wallace Drive, Suite 110Carrollton, TX 75006

[email protected]

(0909) HT3P086156-13Y EM09A017

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